363 papers
This study demonstrates that traditional and isophote-derived broadband morphological parameters lack the discriminatory power to distinguish between dwarf galaxy subtypes or from massive counterparts, suggesting that understanding dwarf galaxy evolution will require high-dimensional statistical analysis of large populations from upcoming surveys.
This paper proposes that an evolving intrinsic scatter and normalization in the supermassive black hole-bulge mass relation at high redshifts can reconcile the observed excess amplitude of the gravitational wave background with theoretical models while simultaneously explaining the existence of overmassive black holes in the early universe.
By analyzing X-ray selected AGN in the XXL and Stripe 82X surveys, this study finds that black hole mass, accretion rate, and luminosity show no significant correlation with large-scale dark matter halo environments, suggesting that AGN properties are primarily regulated by internal host-galaxy processes rather than external environmental factors.
Using DESI DR2 data and a mixture model approach, this study identifies 41 new member stars in the C-19 stellar stream, confirming its extremely metal-poor nature ([Fe/H] = -3.36) and high velocity dispersion (7.8 km/s) that challenges the conventional globular cluster progenitor hypothesis.
This study utilizes the MACER framework to demonstrate that in a disk galaxy, cold filaments condensing from the circumgalactic medium drive a positive correlation between star formation and AGN activity, while cumulative AGN feedback ultimately quenches the galaxy and paradoxically enhances peak star formation rates by recycling gas into massive cold filaments.
By combining X-ray and optical data for 241 AGN, this study reveals that obscuration is not solely determined by orientation but also by multi-scale gas and dust distributions, identifying distinct populations of X-ray absorbed broad-line AGN and X-ray unabsorbed narrow-line AGN that exhibit unique host galaxy properties and accretion behaviors.
This paper employs a semi-analytic two-component model to analyze the thermal evolution of the central star in the Pa 30 nebula, concluding that its observed properties are best explained by a core mass of 1.15–1.4 solar masses and a small hot envelope, supporting a scenario where SN 1181 resulted from the merger of O/Ne and C/O white dwarfs.
This study utilizes panchromatic photometry and the BEAST tool to characterize the massive main-sequence star population in the metal-poor dwarf galaxy Sextans A, identifying hundreds of candidates, quantifying OBe fractions and isolated stars, and predicting high Lyman continuum escape fractions to establish Sextans A as a benchmark for low-metallicity massive-star evolution and feedback.
This paper numerically demonstrates that while non-degenerate one-dimensional self-gravitating systems relax on a timescale linear in particle number , harmonic systems with degenerate orbital frequencies exhibit a significantly slower quadratic relaxation scaling (), with partially degenerate systems transitioning between these regimes depending on the fraction of degenerate orbits.
The PACHA project utilizes quasi-simultaneous NuSTAR and XMM-Newton observations of high-redshift AGN to reveal significantly lower coronal temperatures and higher optical depths compared to local AGN, suggesting efficient Compton cooling and consistency with purely thermal radiation MHD simulations.
Using JWST/NIRSpec observations of galaxies at $2.7 < z < 7z \gtrsim 4z \sim 5$.
Using a high-purity, magnitude-complete sample of 24,471 high-velocity stars from Gaia DR3, this study presents the first continuous measurement of the Milky Way's stellar halo luminosity function from subdwarfs to bright giants, revealing a local halo density of $1.7\times10^{-4}\,^{-3}$ and a disk-to-halo ratio of 480:1.
This paper proposes that remnant lobed AGNs in massive clusters are significantly undercounted because their lobes rapidly implode upon jet cessation due to weak support, leading to a substantial underestimation of low-powered jet feedback in these environments.
This paper presents direct observational evidence that gas accretion from the cosmic web, indicated by rare blue-dominated Lyman-alpha emission profiles, triggers bursty star formation in ultra-low-mass galaxies at redshift 3.066.
This paper presents multi-wavelength observations of a candidate collisional ring galaxy at with high star formation activity, arguing that its morphology likely results from a galaxy collision while acknowledging that a strong gravitational lensing scenario cannot be fully ruled out without further kinematic data.
The paper introduces pyKurucz, a pure Python reimplementation of the legacy Fortran SYNTHE code for stellar spectrum synthesis that achieves sub-0.01% agreement with the original while enabling modern integration with machine learning workflows and ensuring long-term maintainability.
This paper revises the traditional single-arc model of cataclysmic variable bow shocks by demonstrating through multi-wavelength observations of three systems that they actually consist of a two-shock configuration, where a bright inner optical arc represents the terminal wind shock and a newly identified extended mid-infrared arc marks the forward shock boundary.
This paper proposes that the tight local supermassive black hole-galaxy mass relation emerges naturally from merger-driven evolution that averages out initial scatter, successfully reproducing observed high-redshift overmassive black holes without invoking AGN feedback.
By analyzing Gaia DR3 data and comparing it with N-body simulations of gas expulsion and subcluster coalescence, the study concludes that the observed evolution of the most massive star versus cluster mass relation supports subcluster coalescence as the dominant formation pathway for open clusters.
This study analyzes high-cadence light curves of nearly 9,500 bright quasars to reveal that continuum reverberation lags remain significantly larger than standard disk theory predictions even at high luminosities, suggesting that the observed anti-correlation with luminosity is driven by wavelength effects and widespread contamination from variable diffuse emission.